Renewable fuse



Dec. 11 1923. 1,476,964 J. B. GLOWACKI RENEWABLE FUSE Original Filed July 21. 1919 w/ Essss I ln 5 l J fmfi loafaciz' "am n Patented Dec. 1], 923.

UNITED STATES JOHN B. GLDWACKI, OF CHICAGO, ILLINOIS.

. RENEWABLE FUSE.

Application fled July 21, 1919, Serial To all whom it may concern:

Be it known that I, J OHN B. GLOWACKI, a subject of the Republic of Poland, having declared my intention to become a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Renewable Fuse; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked "thereon, which form a part of this specification.

his invention relates to fuses, more particularly those employing a cartridge containing a strp of readily fusible metal.

Heretofore in fuses of this type the relacement of the fuse link in the cartridge iias been a difficult o ration.

The principal ob ect, therefore, of the present invention is to provide a'simple, inexpensive fuse cartridge from which the fuse link may be readily removed and replaced without the use of tools.

Other and further important objects of this invention will be apparent from the disclosures in the specification and drawin l 'he invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a side view of a fuse and a support therefor embodying the features of the present invention.

Figure 2 is an end view of the same.

Figure 3 is a longitudinal central section through the fuse cartridge with parts in elevatio i Figure 4 is a section on the line 4-4 of Figure? Figure 5 is an end view of the fuse cartridge.

Figure 6 is a section Figure 4. I Figure 7 is a plan view of As shown in the drawings: v

The fuse cartridge 1 is shown supported by a pair of spring contacts 2 mounted on a suitable base 3. These contacts may be connected to the source of current in any desired manner.

The construction of the cartridge 1 is shown more particularly in Figure 3. A tube on the line 6-6 of the fuse link.

4, preferably of insulating material such as No. 312,340. Renewed A ril 25, 1923.

fibre or other suitable material, conveniently forms the bod of the cartrid e case. To one end of this tube a central y apertured ,cap 5 is secured by any suitable means such 'larly in Figure 4, may conveniently consist of a cylinder 9 of non-conducting material such as fibre, with a metallic cap 10 secured to each end. Preferably each cap is provided with a central boss 13 adapted to pass through the aperture in one or other of the caps 5 and 8.

Along one side of the cylinder 9 is arranged asuitable fuse link 11, with its ends clamped to the caps 10 by means of split rinlgs 12.

he parts of the cartridge and fuse element carried thereby are so proportioned that the distance between the shoulders of the caps 10 is slightly greater than the distance between the inner faces of the caps 5 and 8 when the latter is screwed home so that the caps 5 and 8 may be pressed firmly against the caps 10 to provide good electrical contact therewith and hold the same firmly in place.

I employ a fuse link made of composition metal having a'series of sections of reduced width, as shown in Figure 7. In the cylinder 9 grooves 15 are provided adapted to register with the sections 14 of the fusible link and thereby provide ample air space therearound. Of course, it is obvious that the fusible link may be made in various sizes and metal compositions so that it may be adapted for use with different currents and the ends of the are slipped over the ends of the fuse link and the fuse element is then ready for reinsertion in the cartridge.

It should be observed that if the rings 12 are allowed to project beyond the ends of the caps 10, they will be pushed into place when the fuse element is placed within the screwed into posicartridge and the cap 8 tion. Obviously a plain strip fuse may be employed, however, the form shown in the drawings is preferred.

I am aware that numerous details of construction may be yariedthrough awide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art andthe annexed claims. Y

I claim as my invention:

1. A renewable fuse comprising in combination a tube of insulating material, a fuse holder within the tube having metallic end pieces comprising clamps, contactmembeIs at each end of said tube, one of said members being adjustable longitudinally of the tube to clamp the fuse holder between said. members and maintain electrical con- :gact between said end pieces and said memers.

2. A renewable fuse com rising in combination a fuse holder having metallic end pieces comprising clamps, and a pair of contact members adapted to be brought toward each other to grip the fuse holder therebetween and maintain electrical. conbers. Y

3. A renew-able fuse comprising in combination a tube of insulating material, an apertured cap secured to one end of the tube, a metallic apertured cap having threaded engagement with a ferrule fixed to the other I end of the tube, a fuse holder having end pieces adapted to contact electrically with said caps, and central lugs on said end pieces adapted to extend through said apertures.

4;. In a fuse device, ing member, a conducting cap on each end of said member, split rings, one clasping each of said caps, an insulating housing surrounding said cylinder and caps, and end pieces on said housing connected to said caps. Y

5. In a fuse device, a cylindrical insulatmg member, a conductlng cap on each end of said member, split rings, one clasping a cylindrical insulat 

